Creates a new bulk job for sending messages to multiple recipients.
Required: message.event (event ID or notification ID)
Optional (V2 format): message.template (notification ID) or message.content (Elemental content)
can be provided to override the notification associated with the event.
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Bulk message definition. Supports two formats:
event field (event ID or notification ID)template (notification ID) or content (Elemental content) in addition to event